METHOD FOR DETERMINING THE CONTENT OF UNFROZEN WATER IN FROZEN SOILS Russian patent published in 2018 - IPC G01N25/56 

FIELD: mining.

SUBSTANCE: invention relates to geology and to mining sciences, namely to geocryology, and allows to determine the content of unfrozen water in various mineral and organogenic frozen soils, as well as in frozen contaminated rocks containing organic (oil, oil products, etc.) and salt components. Method for determining the content of unfrozen water in a soil sample as a function of temperature is that the soil sample is completely dried, weigh it at a positive temperature, evenly saturate the sample with moisture until the value of the total moisture capacity, then a step drying of the sample is carried out, the sample is weighed on each step at the same temperature, and the weight moisture of the sample is determined from each step. Thermodynamic activity of pore moisture is also measured at each stage at the same temperature. Measured values determine the negative temperature values of Celsius at which phase equilibrium of ice with porous moisture takes place for a sample with measured values of activity and moisture content, and the obtained values determine the dependence of the content of unfrozen water in the soil sample on temperature, i.e. the curve of unfrozen water.

EFFECT: increase the accuracy of determining the content of unfrozen water in frozen soils.

5 cl, 2 dwg, 6 tbl